nextcloud-desktop/shell_integration/MacOSX/OwnCloudFinder/FinishedIconCache.m

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//
// FinishedIconCache.m
// OwnCloudFinder
//
// Created by Markus Goetz on 01/10/14.
//
//
#import "FinishedIconCache.h"
@interface FinishedIconCacheItem : NSObject
@property (nonatomic, strong) NSImage *icon;
@property (nonatomic) NSTimeInterval maxAge;
@end
@implementation FinishedIconCacheItem
@synthesize icon;
@synthesize maxAge;
- (void)dealloc {
//NSLog(@"RELEASE %@ %@", self, self.icon);
if (self.icon) {
[self->icon release];
}
[super dealloc];
}
@end
@implementation FinishedIconCache
static FinishedIconCache* sharedInstance = nil;
- init
{
self = [super init];
if (self)
{
_cache = [[NSCache alloc] init];
_cache.totalCostLimit = (2880 * 1800); // mbp15 screen size
_hits = 0;
_misses = 0;
}
return self;
}
- (void)dealloc
{
[_cache dealloc];
[super dealloc];
}
+ (FinishedIconCache*)sharedInstance
{
@synchronized(self)
{
if (sharedInstance == nil)
{
sharedInstance = [[self alloc] init];
}
}
return sharedInstance;
}
- (NSImage*)getIcon:(NSString*)fileName overlayIconIndex:(int)idx width:(float)w height:(float)h
{
NSString *cacheKey = [NSString stringWithFormat:@"%@--%d--%f%f", fileName, idx, w,h];
FinishedIconCacheItem *item = [_cache objectForKey:cacheKey];
if (item) {
if (item.maxAge > [[NSDate date] timeIntervalSinceReferenceDate]) {
_hits++;
return item.icon;
}
}
_misses++;
return NULL;
}
- (void)registerIcon:(NSImage*)icon withFileName:(NSString*)fileName overlayIconIndex:(int)idx width:(float)w height:(float)h
{
NSString *cacheKey = [NSString stringWithFormat:@"%@--%d--%f%f", fileName, idx, w, h];
FinishedIconCacheItem *item = [[FinishedIconCacheItem alloc] init];
item.icon = icon;
// max age between 1 sec and 5 sec
item.maxAge = [[NSDate date] timeIntervalSinceReferenceDate] + 1.0 + 4.0*((double)arc4random() / 0x100000000);
[_cache setObject:item forKey:cacheKey cost:w*h];
[item release];
//NSLog(@"CACHE hit/miss ratio: %f", (float)_hits/(float)_misses);
}
@end